Apologies in advance for my ignorance and lack of mechanical understanding.
So... I decided I wanted to measure rotor runout on my GT-R and picked up a tool similar to this, that basically holds a guage in place, and you turn the rotor on the hub and it measures any variation in the disc surface. But... the GT-R has AWD and so the front hub will not turn freely (right?) is there any way to get the rotor to spin freely? Or am going to have to pull the rotor off and either take it somewhere to get measured or mount it on something that can spin freely?